EWI system provides assured thermal performance

Knauf Marmorit’s Warm Wall Energy is an external wall insulation system that incorporates an innovative tongued and grooved expanded polystyrene (EPS) insulant that not only makes it simple to apply but also provides assured thermal performance by eliminating the risk of cold bridging between joints.

Warm Wall Energy is a multi-layered system that can be applied to virtually any substrate. Available in a range of thicknesses, it enables U-values as low as 0.15 W/m2K to be achieved while providing a bright, durable, low-maintenance finish for any new build or refurbishment project.

A typical system comprises a layer of Knauf’s versatile SM700PRO used as an adhesive below the tongued and grooved insulation. A basecoat of SM700PRO is then applied and reinforced with a 5mm x 5mm mesh, prior to an aqueous emulsion and quartzsand primer, completed by a top coat from a choice of Knauf Marmorit’s Noblo or Conni-S renders, depending on the finish required.

The finishing coats offer the option of silicon or marble-based through-coloured renders in a variety of grain sizes and a choice of over 500 colours.

The tongued and grooved EPS insulation core provides strong, flush joints and a level surface for the application of renders. It is CFC and GCFC free and flame retardant, contributing to a class B1 system. It is available in thicknesses from 40mm to 200mm and with thermal conductivities of 0.032 W/mK or 0.038 W/mK, depending on the thermal performance required. Applied to a 225mm solid brick construction, a Warm Wall Energy system with just 90mm of high performance insulation will achieve a U-value of 0.30 W/m2K.

A complete insulating façade system, Warm Wall Energy also includes a wide range of associated components including system fixings, starter tracks, boards for plinths and fire breaks, coated EPS profiles, joint sealant strips, render beads and trims.

For further information on Warm Wall Energy, visit www.marmorit.co.uk